The first activity in our process is to move the document to a different library on same SharePoint site.
If the user who uploads the document to library is a Domain Admin there are no errors.
If the user who uploads the document to library is only a Domain User we get an Error in the Workflow Server Instances list status field. When we hover over the error, the message contains this text:
Server was unable to process request. --> File: could not be found.

Any idea on how to resolve this issue?